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Corneal suture nail based on shape memory alloy

A technology of memory alloy and suture staples, which is applied in the field of corneal suture staples, can solve problems such as difficulty in uniform corneal tension, limited operating space, and uneven corneal tension.

Inactive Publication Date: 2013-02-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accuracy and strength of the suture cannot be guaranteed by the doctor's feeling and experience alone, and the accuracy is poor
The operating space during the operation is also greatly limited, and it is very difficult for the doctor to use forceps to hold the suture needle
The tension of the cornea after knotting is not uniform, and it is very difficult to make the corneal tension uniform by adjusting the corneal suture; the healing edge is not neat, and complications are prone to occur after surgery

Method used

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  • Corneal suture nail based on shape memory alloy
  • Corneal suture nail based on shape memory alloy
  • Corneal suture nail based on shape memory alloy

Examples

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Embodiment Construction

[0021] Such as figure 1 As shown, before the phase transition of the shape memory alloy-based corneal staple in the present invention, one end of the corneal slice needs to be held with medical tweezers, and the waist 1 of the corneal staple must be held with another pair of tweezers, close to the legs of the staple and At the junction 3 of the waist, utilize the triangular edge of the corneal staple leg tip 7 to pierce the corneal implant bed, and then pierce the other end of the corneal staple into the corneal slice.

[0022] When the corneal staple penetrates into the cornea, the temperature gradually tends to be consistent with the corneal temperature, and occurs when the phase transition temperature reaches 30 degrees figure 2 In the variant shown, the angle between the two legs of the corneal staple is approximately 90 degrees, compressing the corneal implant bed and corneal slice together for healing.

[0023] In the present invention, it is necessary to ensure that ...

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Abstract

The invention discloses a corneal suture nail based on a shape memory alloy. The leg part of the corneal suture nail generates a corresponding displacement due to deformation generated by the shape memory effect of the shape memory alloy, namely titanium nickel alloy, so that the corneal wounds come into contact and heal. In the invention, the used material is the titanium nickel alloy with the shape memory effect, when the ambient temperature is higher than the phase transformation temperature, the titanium nickel alloy generates martensitic phase transformation, so that the leg part of the corneal suture nail deforms and hooks the corneal tightly. The span of the corneal suture nail is 2.5mm, the length of the leg part of the corneal suture nail is 0.5mm, the radius of curvature of the waist part of the corneal suture nail is 8mm, the angle between two nail legs of the corneal suture nail is 90 degrees, the size of section of the corneal suture nail is 0.3*0.1mm<2> (the length of 0.3mm is in the thickness direction), and the leg part of the corneal suture nail is of a triangular pyramid shape with a blade to be pierced into the corneal incision conveniently.

Description

technical field [0001] The present invention relates to a corneal suture staple based on shape memory alloy, more specifically, relates to a new ophthalmic surgical suturing method which replaces the currently used sewing needle suture method. Background technique [0002] At present, manual sutures are commonly used in eye corneal surgical sutures. Manual sutures mainly rely on medical sutures to fix the corneal slice and corneal bed to achieve the healing effect of corneal wounds, and suture needles are required to pull the sutures. Perform operations such as tying knots and removing stitches. The accuracy and strength of the suture cannot be guaranteed by the doctor's feeling and experience alone, and the accuracy is poor. The operating space during the operation is also greatly limited, and it is very difficult for the doctor to use forceps to hold the suture needle. The tension of the cornea after knotting is not uniform, and it is very difficult to make the corneal t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F9/007A61L17/00
Inventor 杨洋王璐孙繁新
Owner BEIHANG UNIV
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